Merge branch 'saa/add_default_value_for_maps_get/OTP-11951' into maint

* saa/add_default_value_for_maps_get/OTP-11951:
  stdlib: Fix indentation of maps doc
  Add docs and test for maps:get/3
  Add default value for maps:get

1 files changed, 69 insertions, 0 deletions

diff --git a/lib/stdlib/test/maps_SUITE.erl b/lib/stdlib/test/maps_SUITE.erl
new file mode 100644
index 0000000000..c826ee731a
--- /dev/null
+++ b/lib/stdlib/test/maps_SUITE.erl
@@ -0,0 +1,69 @@
+%%
+%% %CopyrightBegin%
+%%
+%% Copyright Ericsson AB 1997-2014. All Rights Reserved.
+%%
+%% The contents of this file are subject to the Erlang Public License,
+%% Version 1.1, (the "License"); you may not use this file except in
+%% compliance with the License. You should have received a copy of the
+%% Erlang Public License along with this software. If not, it can be
+%% retrieved online at http://www.erlang.org/.
+%%
+%% Software distributed under the License is distributed on an "AS IS"
+%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+%% the License for the specific language governing rights and limitations
+%% under the License.
+%%
+%% %CopyrightEnd%
+%%
+%%%----------------------------------------------------------------
+%%% Purpose: Test suite for the 'maps' module.
+%%%-----------------------------------------------------------------
+
+-module(maps_SUITE).
+
+-include_lib("test_server/include/test_server.hrl").
+
+% Default timetrap timeout (set in init_per_testcase).
+% This should be set relatively high (10-15 times the expected
+% max testcasetime).
+-define(default_timeout, ?t:minutes(4)).
+
+% Test server specific exports
+-export([all/0]).
+-export([suite/0]).
+-export([init_per_suite/1]).
+-export([end_per_suite/1]).
+-export([init_per_testcase/2]).
+-export([end_per_testcase/2]).
+
+-export([get3/1]).
+
+suite() ->
+    [{ct_hooks, [ts_install_cth]}].
+
+all() ->
+    [get3].
+
+init_per_suite(Config) ->
+    Config.
+
+end_per_suite(_Config) ->
+    ok.
+
+init_per_testcase(_Case, Config) ->
+    ?line Dog=test_server:timetrap(?default_timeout),
+    [{watchdog, Dog}|Config].
+
+end_per_testcase(_Case, Config) ->
+    Dog=?config(watchdog, Config),
+    test_server:timetrap_cancel(Dog),
+    ok.
+
+get3(Config) when is_list(Config) ->
+    Map = #{ key1 => value1, key2 => value2 },
+    DefaultValue = "Default value",
+    ?line value1 = maps:get(key1, Map, DefaultValue),
+    ?line value2 = maps:get(key2, Map, DefaultValue),
+    ?line DefaultValue = maps:get(key3, Map, DefaultValue),
+    ok.